:root {
  --primary-bg: #0a0a0a;
  --secondary-bg: #111;
  --accent-primary: #00d4ff;
  --accent-secondary: #ff0080;
  --text-primary: #fff;
  --text-secondary: #a0a0a0;
  --text-muted: #666;
  --border-color: #333;
  --glass-bg: rgb(255 255 255 / 5%);
  --glass-border: rgb(255 255 255 / 10%);
  --gradient-primary: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  --gradient-secondary: linear-gradient(
    135deg,
    rgb(0 212 255 / 10%),
    rgb(255 0 128 / 10%)
  );
  --shadow-primary: 0 20px 40px rgb(0 212 255 / 30%);
  --shadow-secondary: 0 10px 30px rgb(0 0 0 / 30%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

::selection {
  background: var(--accent-primary);
  color: var(--primary-bg);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--secondary-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 4px;
}

/* Navigation */
.navbar {
  background: rgb(10 10 10 / 90%);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
  padding: 1rem 0;
}

.navbar.scrolled {
  background: rgb(10 10 10 / 95%);
  box-shadow: var(--shadow-secondary);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.8rem;
  text-decoration: none;
}

.brand-text {
  background: var(--gradient-primary);
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-nav .nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  margin: 0 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--text-primary);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
}

.navbar-nav .nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
  width: 80%;
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--primary-bg);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(
      circle at 20% 50%,
      rgb(0 212 255 / 10%) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgb(255 0 128 / 10%) 0%,
      transparent 50%
    ),
    radial-gradient(circle at 40% 80%, rgb(0 212 255 / 5%) 0%, transparent 50%);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-20px);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-greeting {
  font-size: 1.2rem;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.hero-name {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: var(--gradient-primary);
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.hero-title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.floating-elements {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.float-element {
  position: absolute;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--gradient-secondary);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  animation: float-element 4s ease-in-out infinite;
}

.float-element:nth-child(1) {
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.float-element:nth-child(2) {
  top: 50%;
  right: 20%;
  animation-delay: 1s;
}

.float-element:nth-child(3) {
  bottom: 20%;
  left: 30%;
  animation-delay: 2s;
}

@keyframes float-element {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-30px) rotate(180deg);
  }
}

/* Buttons */
.btn {
  border: none;
  padding: 0.75rem 2rem;
  font-weight: 600;
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 25px 50px rgb(0 212 255 / 40%);
  color: var(--text-primary);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--accent-primary);
}

.btn-outline:hover {
  background: var(--accent-primary);
  color: var(--primary-bg);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--secondary-bg);
  color: var(--text-primary);
}

/* Sections */
section {
  padding: 5rem 0;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  text-align: center;
  background: var(--gradient-primary);
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* About Section */
.about-section {
  background: var(--secondary-bg);
  position: relative;
}

.about-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-secondary);
  opacity: 0.3;
}

.about-content {
  position: relative;
  z-index: 2;
}

.about-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.tech-stack {
  margin-top: 2rem;
}

.tech-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.tech-grid {
  display: grid;
  gap: 2rem;
}

.tech-category h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

/* Projects Section */
.projects-section {
  background: var(--primary-bg);
  position: relative;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  justify-items: stretch;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1rem;
}

.project-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  overflow: hidden;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-primary);
  border-color: var(--accent-primary);
}

.project-image-wrapper {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 0.3s ease;
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgb(0 0 0 / 80%);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.3s ease;
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-card:hover .project-image {
  transform: scale(1.1);
}

.project-content {
  padding: 1.5rem;
}

.project-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tag {
  background: var(--gradient-secondary);
  color: var(--accent-primary);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--glass-border);
}

/* Contact Section */
.contact-section {
  background: var(--secondary-bg);
  position: relative;
}

.contact-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-secondary);
  opacity: 0.2;
}

.contact-content {
  position: relative;
  z-index: 2;
}

.contact-form {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-secondary);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(5px);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgb(0 212 255 / 10%);
  background: var(--secondary-bg);
}

.form-control::placeholder {
  color: var(--text-muted);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.response-message {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  font-weight: 500;
}

.response-message.success {
  background: rgb(0 212 255 / 10%);
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.response-message.error {
  background: rgb(255 0 128 / 10%);
  color: var(--accent-secondary);
  border: 1px solid var(--accent-secondary);
}

/* Footer + tech icons */
.footer {
  background: var(--primary-bg);
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
  position: relative;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  width: 40px;
  height: 40px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.footer i {
  font-size: 1rem;
  color: var(--accent-primary);
  transition: all 0.3s ease;
}

.footer-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.tech-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.tech-icon {
  width: 60px;
  height: 60px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.tech-icon:hover,
.footer-links a:hover {
  transform: translateY(-5px);
  background: var(--gradient-secondary);
  border-color: var(--accent-primary);
  box-shadow: 0 10px 30px rgb(0 212 255 / 30%);
}

.tech-icon i {
  font-size: 2rem;
  color: var(--accent-primary);
  transition: all 0.3s ease;
}

.tech-icon:hover i,
.footer a:hover i {
  color: var(--text-primary);
  transform: scale(1.2);
}

.btt-link {
  width: 40px;
  height: 40px;
  background: var(--accent-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btt-link:hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
}

.btt-link img {
  width: 20px;
  height: 20px;
  filter: brightness(0) invert(1);
  transform: rotate(-90deg);
}

/* Animations */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

[data-animate="left"] {
  transform: translateX(-50px);
}

[data-animate="right"] {
  transform: translateX(50px);
}

[data-animate="fade"] {
  transform: translateY(30px);
}

[data-animate].animated {
  opacity: 1;
  transform: translateX(0) translateY(0);
}

/* Responsive Design */
@media (width >=1200px) {
  .projects-grid {
    grid-template-columns: repeat(3, minmax(300px, 1fr));
    max-width: 1200px;
    padding: 0;
  }
}

@media (width <=1200px) {
  .hero-section {
    text-align: center;
  }

  .hero-content .container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 80vh;
  }

  .hero-text {
    margin: 0 auto;
    margin-bottom: 2rem;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

  .row.align-items-center {
    flex-direction: column-reverse;
  }

  .col-lg-6 {
    width: 100%;
    max-width: 100% !important;
  }

  .tech-stack {
    text-align: center;
  }

  .tech-icons {
    justify-content: center;
  }

  .projects-grid {
    grid-template-columns: repeat(2, minmax(300px, 1fr));
    padding: 0 2rem;
  }

  .bottom-tech {
    justify-content: center;
  }
}

@media (width <=768px) {
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: auto;
    margin-bottom: 0.5rem;
  }

  .tech-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    padding: 0 1.5rem;
    gap: 1.5rem;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .contact-form {
    padding: 1.5rem;
  }

  .floating-elements {
    display: none;
  }

  section {
    padding: 3rem 0;
  }
}

@media (width <=480px) {
  .hero-name {
    font-size: 2.5rem;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .projects-grid {
    padding: 1rem;
  }

  .contact-form {
    padding: 1rem;
  }
}